<label class="switch">
  <input type="checkbox">
  <span class="slider"></span>
</label>
<style>
/* From Uiverse.io by zebra76966 - Tags: switch, moon, sun, toggle, light&dark, emoji */
.switch {
  position: absolute;
  top: 50%;
  width: 30px;
  height: 60px;
  padding: 2px;
  left: 50%;
  transform: translate(-50%,-50%);
}

.switch input {
  opacity: 0;
  height: 0;
  width: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 20px;
  border: 1px solid rgba(0,0,0,0.2);
  border-style: outset;
  background-color: white;
  transition: 0.4s;
}

.slider::before {
  content: "🌞";
  font-size: 22px;
  line-height: 15px;
  border-radius: 100%;
  position: absolute;
  left: -0.8px;
  top: 8px;
  background-color: transparent;
  transition: 0.4s;
}

.switch > input:checked + .slider {
  background-color: #000429;
}

.switch > input:checked + .slider:before {
  content: "🌑";
  font-size: 22px;
  line-height: 25px;
  background-color: transparent;
  transform: translateY(24px);
}
</style>
